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USB box controls, monitors relays

Posted: 17 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:i/o module? measurement computing? usb-ssr24? solid-state relay? relay?

As a follow-on to its recently introduced digital I/O module, Measurement Computing Corp. announces its $299 USB-SSR24, a USB device for monitoring and controlling solid-state relays. As the product designation implies, the USB-SSR24 offers 24 channels of isolated I/O through standard-size solid-state relay modules (the modules are sold separately).

Daisy-chain without a hub

The USB-SSR24, with integrated screw terminals, features an all-aluminum enclosure to protect its electronics and wiring, and a built-in USB expansion port. The latter lets you chain up to five devices together without requiring an external USB hub. There's also an integrated DIN-rail mount, although the enclosure can reside on your benchtop, too.

Measurement Computing contends that the USB-SSR24 will give you a measurement advantage over PCI-based systems, arguing that as PCI slots get ore scarcer, the advantage of USB-based data acquisition becomes significant. What's more, the USB-SSR24, compared to an equivalent PCI-based system, is easier to use because it represents an all-in-one approach and eliminates the need to open a PC chassis.

Change applications

The USB-SSR24 is also flexible and cost-effective. Its USB interface permits you to move the device quickly from one application to another, or to expand an application to include up to five devices (which could hold up to 120 solid-state relay modules). Finally, the USB-SSR24 is almost the same price as a PCI-based approach would be.

The unit also complements the company's other USB-based high-voltage digital products, namely the USB-SSR08. It offers the same functions as the USB-SSR24 but in an eight-channel form-factor. The USB-SSR24 also complements the company's USB-ERB08 and USB-ERB24 units; these pack electromechanical relays. Measurement's USB-PDISO8 has eight electromechanical relays and eight high-voltage (up to 24Vac or dc) inputs.

Freebie executables

Free software is also provided in a variety of forms. All products include the company's TracerDAQ, stripchart recorder and data logger application. Also included is SoftWIRE, the popular graphical programming interface for Visual Studio .NET. You also get a copy of Measurement Computing's Universal Library language interface, which lets you write programs in all popular programming languages using a high-level command syntax.

All of the aforementioned USB products also include drivers for most popular data acquisition application packages including National Instruments's LabVIEW.

- Alex Mendelsohn


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